$wpdb->set_prefix( $table_prefix, false ); // $table_prefix can be set in sunrise.php
$wpdb->set_blog_id( $current_blog->blog_id, $current_blog->site_id );
$table_prefix = $wpdb->get_blog_prefix();
+$_wp_switched_stack = array();
+$switched = false;
// need to init cache again after blog_id is set
wp_start_object_cache();